package thread;

class MyBlockingQueue {
    private String[] data = new String[1000];

    private volatile int head = 0;
    private volatile int tail = 0;
    private volatile int size = 0;

    public synchronized void put(String elem) throws InterruptedException {
        while (size == data.length) {
            this.wait();
        }
        data[tail] = elem;
        tail++;
        if (tail == data.length) {
            tail = 0;
        }
        size++;
        this.notify();
    }

    public synchronized String take() throws InterruptedException {
        while (size == 0) {
            this.wait();
        }
        String ret = data[head];
        head++;
        if (head == data.length) {
            head = 0;
        }
        size--;
        this.notify();
        return ret;
    }
}

public class Demo10 {
    public static void main(String[] args) {
        MyBlockingQueue myBlockingQueue = new MyBlockingQueue();
        //消费者
        Thread t1 = new Thread(() -> {
            while (true) {
                try {
                    String result = myBlockingQueue.take();
                    System.out.println("消费元素" + result);
                    Thread.sleep(500);

                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        });
        //生产者
        Thread t2 = new Thread(() -> {
            int num = 1;
            while (true) {
                try {
                    myBlockingQueue.put(num + "");
                    System.out.println("生产元素" + num);
                    num++;
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        });
        t1.start();
        t2.start();
    }
}
